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-Structure paper
| タイトル | Molecular dysregulation of ciliary polycystin-2 channels caused by variants in the TOP domain. |
|---|---|
| ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 117, Issue 19, Page 10329-10338, Year 2020 |
| 掲載日 | 2020年5月12日 |
著者 | Thuy N Vien / Jinliang Wang / Leo C T Ng / Erhu Cao / Paul G DeCaen / ![]() |
| PubMed 要旨 | Genetic variants in which encodes for the polycystin-2 ion channel are responsible for many clinical cases of autosomal dominant polycystic kidney disease (ADPKD). Despite our strong understanding ...Genetic variants in which encodes for the polycystin-2 ion channel are responsible for many clinical cases of autosomal dominant polycystic kidney disease (ADPKD). Despite our strong understanding of the genetic basis of ADPKD, we do not know how most variants impact channel function. Polycystin-2 is found in organelle membranes, including the primary cilium-an antennae-like structure on the luminal side of the collecting duct. In this study, we focus on the structural and mechanistic regulation of polycystin-2 by its TOP domain-a site with unknown function that is commonly altered by missense variants. We use direct cilia electrophysiology, cryogenic electron microscopy, and superresolution imaging to determine that variants of the TOP domain finger 1 motif destabilizes the channel structure and impairs channel opening without altering cilia localization and channel assembly. Our findings support the channelopathy classification of variants associated with ADPKD, where polycystin-2 channel dysregulation in the primary cilia may contribute to cystogenesis. |
リンク | Proc Natl Acad Sci U S A / PubMed:32332171 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.24 Å |
| 構造データ | EMDB-21586, PDB-6wb8: |
| 化合物 | ![]() ChemComp-NAG: |
| 由来 |
|
キーワード | TRANSPORT PROTEIN / PKD2 |
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homo sapiens (ヒト)
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